Why don't the HOMT tandem breakers fit into all Homeline load

Why don't the HOMT tandem breakers fit into all Homeline load two breakers in one slot A tandem breaker fits two individual breakers into the size of one That allows you to add new breakers when your breaker box doesn't have any new slots two slot Please see comment below for information on how to combine 2 Double Pull Breakers to free

two slot breakers are designed to protect your wires from carrying too much current by tripping off an overload or a short circuit Whenever you need to add a new

two breakers in one slot A tandem breaker is TWO separate 120v circuit on a single breaker img Electrician: WireGuyFranklin If you switch the bottom wire to the top So if the manufacturer has designed a panel to take only full height breakers, then you can't use the pancake breakers or the twins